ammonites
Prionolobus atavus Waagen 1895 (ceratite)

Cephalopoda - Ceratitida - Proptychitidae

Full reference: W. Waagen. 1895. Fossils from the Ceratite Formation. Salt Range Fossils, Palaeontologia Indica, Series 13 2(1):1-323

Belongs to Prionolobus according to W. Waagen 1895

Sister taxa: Meekoceras (Prionolobus) waageni, Prionolobus buchianus, Prionolobus compressus, Prionolobus hubeiensis, Prionolobus impressus, Prionolobus konincki, Prionolobus lucinus, Prionolobus ophioneus, Prionolobus ovalis, Prionolobus plicatilis, Prionolobus plicatus, Prionolobus rotundatus, Prionolobus sequens, Prionolobus undatus, Prionolobus welteri

Type specimen: Its type locality is Virgal, Lower Ceratite Limestone, Salt Range, which is in a Dienerian marine limestone in the Lower Ceratite Limestone Formation of Pakistan

Ecology: nektonic carnivore

Average measurements (in mm): shell width 9.08, shell diameter 37.4